/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_BITS_H
#define __LINUX_BITS_H
#include <asm/bitsperlong.h>


#ifdef __x86_64__
# define BITS_PER_LONG 64
#else
# define BITS_PER_LONG 32
#endif
#ifndef BITS_PER_LONG_LONG
#define BITS_PER_LONG_LONG 64
#endif


#define BIT(nr)                 (1UL << (nr))
#define BIT_ULL(nr)             (1ULL << (nr))
#define BIT_MASK(nr)            (1UL << ((nr) % BITS_PER_LONG))
#define BIT_WORD(nr)            ((nr) / BITS_PER_LONG)
#define BIT_WORD_OFFSET(nr)        ((nr) % BITS_PER_LONG)
#define BIT_ULL_MASK(nr)        (1ULL << ((nr) % BITS_PER_LONG_LONG))
#define BIT_ULL_WORD(nr)        ((nr) / BITS_PER_LONG_LONG)
#define BIT_ULL_WORD_OFFSET(nr)    ((nr) % BITS_PER_LONG_LONG)
#define BITS_PER_BYTE           8

/*
 * Create a contiguous bitmask starting at bit position @l and ending at
 * position @h. For example
 * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000.
 */
#define GENMASK(h, l) \
        (((~0UL) - (1UL << (l)) + 1) & (~0UL >> (BITS_PER_LONG - 1 - (h))))

#define GENMASK_ULL(h, l) \
        (((~0ULL) - (1ULL << (l)) + 1) & \
         (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h))))

#endif  /* __LINUX_BITS_H */
